The Electro-Harmonix Superego Synth Engine Effect Pedal is the effect for the player who wants to create new, lush sounds. The Superego Synth Engine lets you generate organ and synth like tones from your guitar, with infinite sustain and smooth glissandos. Stack sounds for the orchestral effects and alter your attack and decay. The built in effects loop lets you add additional effects to either the dry or processed signal for an endless array of tonal creativity and ethereal beauty.